I'm working on a piece of fiction, and a kind of no-brainer extension of the grav belt is the "luggage" or "freight" grav harness.

Designed as a basket or "net" as per ship cargo nets of days or old, these can be remotely controlled or programmed to take package A to destination B.

A fairly expensive outgrowth of the grav-belt (or a precursor depending on how tech developed on a given world) the grav harness can be found in place of grav lifts, cranes or other mechanical lifting mechanisms, notably at starports as a high cost replacement for baggage handlers / droids / bots that use mechanical means of moving freight of all forms.